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Liftmaster 2000SDR Manual

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An unbalanced garage door might not reverse when
required and someone under the door could be seriously
injured or killed.
If your garage door binds, sticks or is out of balance, call
for professional garage door service.
Garage doors, door
springs, cables, pulleys, brackets, and their hardware are
under extreme tension and can cause serious injury or
death.
Do not try to loosen, move or adjust them
yourself!
Ropes left on a garage door could cause someone to
become entangled and killed.
Remove all ropes
connected to the door before installing and operating the
opener.
To avoid damage to the garage door and opener, disable
locks before installing and operating the opener. Use a
wood screw or nail to hold locks in the "open" (unlocked)
position.
Operation at other than 120V 60 Hz will cause opener
malfunction and damage.
Identify the type and height of your door, any special
conditions that exist, and any additional materials that
may be required.
Test Your Door for Balance
Before you begin, complete the following test to make
sure your door is balanced, and is not sticking or
binding:
• Lift the door about halfway as shown. Release the door.
It should stay in place, supported entirely by its springs.
• Raise and lower the door to see if there is any binding
or sticking.
WARNING
CAUTIONCAUTION
SECTIONAL DOOR
ONE-PIECE DOOR
Sectional
Door
One-Piece
Door
Safety Information and Precautions
Safety Reversing Sensor
Installation
Carriage Bolts 1/4" - 20 x 1/2" (2)
Wing Nut (2)
Insulated Staples (20)
Rail Assembly
Coupling Sleeve (1)
Hex Screw 1/4"-20 x 5/8" (4)
Nut 1/4" - 20 (4)
Opener Installation
Hex Screw 5/16"-18 x 7/8" (4)
Lag Screw 5/16"-9 x 1-5/8" (2)
Lag Screw 5/16"-18 x 1-7/8" (2)
Carriage Bolt 5/16"-18 x 2-1/2" (2)
Clevis Pin 5/16" x 2-3/4" (1)
Clevis Pin 5/16" x 1-1/4" (1)
Clevis Pin 5/16" x 1" (1)
Nut 5/16" - 18 (6)
Lock Washer 5/16" (6)
Screw 6AB x 1-1/4" (2)
Screw 6-32 x 1" (2)
Insulated Staples (10)
Ring Fastener (3)
Handle
Dry Wall Anchors (2)
Rope
Hardware Supplied
3 …


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